Carrier bearing R+R question

Today I went to the millitary base with my truck since they have a auto hobby shop. I lubed my U joints and drive shaft all went well. Just looking around at things to make sure all is good for my 1500 mile trip.


I got to the center carrier bearing and noticed the rubber has shifted a little and there is about quarter inch up and down play. I want to replace it is the drive shaft pressed into the bearing or what?
Truck has 73k miles and previous owner has wheeled it by the dirt on the bottom. It looks pretty easy to replace.

 

Here you go

 

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